JP2003168089A - Non-contact ic card - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact IC card capable of surely protecting personal information recorded in the non-contact IC card. <P>SOLUTION: This non-contact IC card 3 provided with an information storage part for storing information, a communication control part for controlling communication with the outside of the card, and a loop antenna 5 for transmitting and receiving a radio wave, comprises a slide switch, a pressing switch, an attachable and detachable changeover switch or the like, is provided with a disconnection means 12 for forcedly disconnecting communication with the outside of the card, and prevents data held by the non-contact IC card 3 from leaking by forcedly disconnecting the communication with the outside of the card by a disconnecting means 12 in accordance with a use object. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactless IC card used in a contactless IC card system for contactlessly reading personal data.

[0002]

2. Description of the Related Art As a conventional non-contact IC card, the one disclosed in Japanese Patent Laid-Open No. 10-31445 is known.

FIG. 10 is a block diagram showing the structure of a conventional non-contact IC card.

In FIG. 10, 19 is a contactless IC card capable of reading information stored in the card in a contactless manner, and 20 is a proximity antenna 21 and a proximity communication controller 22.
It is a proximity type non-contact part composed of and. The proximity antenna 21 transmits and receives radio waves when communicating with the outside or supplying power in the proximity. In addition, the proximity communication control unit 22
The proximity modulation / demodulation unit 23 and the proximity power supply unit 24 are included.
The proximity modulation / demodulation unit 23 has a function of controlling data communication with the outside in proximity, and the proximity power supply unit 24 has a function of converting radio waves incident from the outside into the proximity antenna 21 into power. .

Reference numeral 25 is a remote-type non-contact part composed of a remote-type antenna 26 and a remote-type communication control part 27. The remote type antenna 26 transmits and receives radio waves when performing communication with the outside or supplying power remotely. Remote type communication control unit 27
Comprises a remote modulation / demodulation unit 28 and a remote power supply unit 29. The remote modulation / demodulation unit 28 has a function of remotely controlling data communication with the outside, and the remote power supply unit 29 has a function of remotely converting radio waves incident from the outside to the remote type antenna 26 into electric power. .

Reference numeral 30 denotes a microprocessor (MPU), which stores an information storage unit 31 for storing a program for performing information processing in the non-contact IC card 19 according to an external command, and information storage according to the external command. An information processing unit 32 that executes a program stored in the unit 31 and performs information processing such as data calculation. 33
Is a power storage unit that temporarily stores power transmitted from the proximity power supply unit 24 and the remote power supply unit 29 and supplies power for operating the information processing unit 32.

With the above configuration, one non-contact I
The C card 19 can be used for both the proximity type and the remote type. In addition, a program that automatically distinguishes between the proximity type and the remote type is stored in the information storage unit 31 by the received radio wave, and the information processing unit 32 executes the program when the radio wave is received. The internal processing of the non-contact IC card 19 can be automatically set, or the proximity type function can be executed in the field requiring high security, and the remote type function can be executed in the field requiring convenience.

[0008]

In recent years, non-contact IC cards having a large number of services have become the mainstream of non-contact IC cards. Therefore, it is a low-priced and compact IC chip that can be used in both a non-contact IC card system used for a long distance and a non-contact IC card system used for a service requiring high security. Is desired.

However, in the above-mentioned conventional non-contact IC card, in order to use it in the long-distance and contact non-contact IC card systems, the long-distance and contact antennas 21 and 26 and the communication controller 22 are respectively provided. , 27 and the like are required, it is difficult to reduce the size and cost of the IC chip used in the non-contact IC card system.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a contactless IC card capable of reliably protecting personal information possessed by the contactless IC card at a low price and in a small size. To do.

[0011]

In order to solve the above problems, a non-contact IC card of the present invention comprises an information storage unit for storing information, a communication control unit for controlling communication with the outside of the card,
A non-contact IC card having a loop antenna for transmitting and receiving radio waves to and from the outside of the card, comprising a disconnecting means for forcibly disconnecting communication with the outside of the card.

With this configuration, it is possible to provide a non-contact IC card capable of reliably protecting personal information possessed by the non-contact IC card at a low price and in a small size.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A non-contact IC card according to claim 1 of the present invention is an information storage unit for storing information, a communication control unit for controlling communication with the outside of the card, and transmission / reception of radio waves with the outside of the card. A non-contact type IC card having a loop antenna for performing the above, and including a disconnecting means for forcibly disconnecting communication with the outside of the card.

With this structure, the disconnection means forcibly disconnects the communication with the outside of the card in accordance with the purpose of use, thereby providing the effect of preventing the leakage of the data held by the non-contact IC card.

Here, as the "cutting means", a slide switch, a pressing switch, a removable switching chip, etc. are used.

According to a second aspect of the invention, in the non-contact IC card according to the first aspect, the disconnecting means is a changeover switch for switching between a state in which the loop antenna can transmit and receive and a state in which the loop antenna cannot transmit and receive. It is a thing.

With this configuration, by making the loop antenna incapable of transmitting and receiving by the changeover switch according to the purpose of use, the inquiry request from the reader / writer can be easily rejected, and the non-contact IC card holds it. The effect of preventing leakage of existing data is obtained.

According to a third aspect of the present invention, in the non-contact IC card according to the second aspect, the loop coil of each loop antenna is fixed to the card body and formed in a shape having a gap in a part of the loop. Fixed conductor and a movable conductor that interlocks with the changeover switch and is inserted and removed in the gap between the fixed conductors. The changeover switch is fixed by inserting the movable conductor into the gap formed in the fixed conductor. The conductor and the movable conductor are connected to each other.

With this configuration, when the changeover switch is changed over, the movable conductor is inserted into and removed from the gap between the fixed conductors of the loop coil in conjunction with the changeover switch. When the movable conductor is inserted into the gap between the fixed conductors, both ends of the gap between the fixed conductors are connected by the movable conductors, and the loop coil forms a complete loop, so that radio waves can be transmitted and received. On the other hand, in the state where the movable conductor is separated from the gap between the fixed conductors, the loop coil does not form a complete loop because both ends of the gap between the fixed conductors are not connected, and radio waves cannot be transmitted / received. This makes it possible to reliably connect or disconnect the loop antenna according to the purpose of use.

According to a fourth aspect of the present invention, in the non-contact IC card according to the third aspect, the changeover switch includes a pressing portion that is removably disposed in a gap formed in the fixed conductor,
And a spring for urging the pressing portion in a direction to separate from the gap formed in the fixed conductor, so that the movable conductor is interlocked with the pressing portion.

With this configuration, it is possible to easily switch the used state or the unused state of the non-contact IC card.

The invention according to claim 5 is the invention according to claim 3 or 4.
In the non-contact IC card according to the item 1, the fixed conductor has a conductor terminal at a portion connected to the movable conductor, the movable conductor has a conductor terminal at a portion connected to the fixed conductor, and the movable conductor has a gap between the fixed conductors. The conductor terminal of the movable conductor is in contact with the conductor terminal of the fixed conductor in a state of being inserted into the.

With this configuration, it is possible to easily switch the used state or the unused state of the non-contact IC card.

The invention according to claim 6 is the invention according to claim 3 or 4.
In the non-contact IC card described in (1), the movable conductor is configured to be connected by inductive coupling between the fixed conductor and the movable conductor without contacting the fixed conductor in a state of being inserted into the gap of the fixed conductor. It is a thing.

With this configuration, it is possible to easily switch the used state or the unused state of the non-contact IC card.

According to a seventh aspect of the present invention, in the non-contact IC card according to the first aspect, the cutting means is composed of a switching chip detachable from the loop antenna, and when the switching chip is attached to the loop antenna. The loop antenna becomes usable, and the loop antenna becomes unusable when the switching chip is detached from the loop antenna.

With this configuration, by removing the switching chip according to the purpose of use, it is possible to reject the reply of the data held by the reader / writer, and the data held by the non-contact IC card can be rejected. The effect of preventing leakage is obtained.

According to an eighth aspect of the present invention, in the non-contact IC card according to the seventh aspect, the loop coil of each loop antenna is fixed to the card body and formed in a shape having a gap in a part of the loop. A fixed conductor that is fixed to the switching chip and a movable conductor that is fixed to the switching chip and is detachably disposed in the gap between the fixed conductors, and the switching chip is mounted in the gap formed in the fixed conductor of each loop antenna. In the above, the fixed conductor and the movable conductor are connected to each other.

With this structure, by inserting / removing the switching chip, the movable conductor is inserted / removed into / from the gap between the fixed conductors of the loop coil. When the movable conductor is inserted into the gap between the fixed conductors, both ends of the gap between the fixed conductors are connected by the movable conductors, and the loop coil forms a complete loop, so that radio waves can be transmitted and received. On the other hand, in the state where the movable conductor is separated from the gap between the fixed conductors, the loop coil does not form a complete loop because both ends of the gap between the fixed conductors are not connected, and radio waves cannot be transmitted / received. This makes it possible to reliably connect or disconnect the loop antenna according to the purpose of use.

According to a ninth aspect of the present invention, in the non-contact IC card according to the eighth aspect, the fixed conductor has a conductor terminal at a portion connected to the movable conductor, and the movable conductor is connected to the fixed conductor. A conductor terminal is provided in a portion, and the conductor terminal of the movable conductor contacts the conductor terminal of the fixed conductor in a state where the movable conductor is inserted into the gap of the fixed conductor.

With this configuration, it is possible to easily switch the used state or the unused state of the non-contact IC card.

According to a tenth aspect of the present invention, in the non-contact IC card according to the eighth aspect, the movable conductor is inserted into the gap between the fixed conductors without contacting the fixed conductors. And the movable conductor are connected by inductive coupling.

With this configuration, it is possible to easily switch the used state or the unused state of the non-contact IC card.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

(Embodiment 1) FIG. 1 is a block diagram showing an example of a non-contact IC card system.

Reference numeral 1 is a reader / writer, 2 is an antenna for transmitting and receiving radio waves under the control of the reader / writer 1, and 3 is a non-contact IC.
It's a card.

FIG. 2 is a functional block diagram showing the configuration of the non-contact IC card according to the first embodiment.

In FIG. 2, reference numeral 3 is a non-contact IC card capable of reading information stored in the card in a non-contact manner,
Reference numeral 4 is an IC chip that controls transmission / reception of the non-contact IC card 3, and reference numeral 5 is a loop antenna that transmits / receives radio waves when communicating with the outside and supplying power. Inside the IC chip 4, a modulation circuit 6 that sends a modulation signal to the antenna 5 when transmitting information, a rectifier circuit 7, a regulator 8, a demodulation circuit 9 that demodulates the signal received by the antenna 5 when receiving information, and A communication control unit 10 that controls transmission / reception and an information storage unit 11 that stores information are built in.

1 and 2, the reader / writer 1
Is a non-contact IC that transmits power and signals to the non-contact IC card 3 at the same time via the antenna 2 and does not hold a battery.
Power and signals are supplied to the card 3. As a result, the reader / writer 1 can normally read the information (such as the ID) held in the information storage unit 11 of the non-contact IC card 3 without the permission of the holder of the non-contact IC card 3. .

FIG. 3 is a schematic plan view showing the loop antenna and the changeover switch of the non-contact IC card according to the first embodiment.

In FIG. 3, 3 is a non-contact IC card, 4 is
2 is an IC chip, and 5 is a loop antenna, which is similar to that in FIG.

In the present embodiment, the loop coil of the loop antenna 5 is fixed to the main body of the non-contact IC card 3 and has a fixed conductor 5a formed in a shape having a gap in a part of the loop, and a fixed conductor. It is composed of a movable conductor 5b which is detachably arranged in the gap 5a. Also, the loop antenna 5
Are formed in a loop having a circular shape, an elliptical shape, a distorted circular shape, or a distorted elliptical shape. Further, the IC chip 4 is arranged at the position of the feeding point of the loop antenna 5. The gap of the loop antenna 5 is formed at a position facing the feeding point.

Reference numeral 12 is a changeover switch for switching the loop antenna 5 between a state in which transmission and reception is possible and a state in which transmission and reception is not possible. In the present embodiment, the changeover switch 12 is
A slide switch is used. The movable conductor 5b is
By interlocking with the changeover switch 12 and switching the changeover switch 12, the movable conductor 5b can be inserted into and removed from the gap between the fixed conductors 5a. The changeover switch 12 has the movable conductor 5 in the gap formed in the fixed conductor 5 a of the loop antenna 5.
By inserting b, the fixed conductor 5a and the movable conductor 5b can be connected.

FIG. 5 is a perspective view of an essential part of a changeover switch according to an embodiment of the present invention.

In FIG. 5, 5 is a loop antenna, 5a
Is a fixed conductor, 5b is a movable conductor, 12 is a changeover switch, 1
Reference numeral 4 is a main body, and 15a and 15b are conductor terminals. The fixed conductor 5a and the movable conductor 5b have metal conductor terminals 15a and 15b at their respective contact portions, and the conductor terminal 15a of the fixed conductor 5a and the conductor terminal 15b of the movable conductor 5b physically contact with each other. The fixed conductor 5a and the movable conductor 5b are connected to form the loop antenna 5.

FIG. 6 is a perspective view of a main part of a changeover switch according to another embodiment of the present invention.

In FIG. 6, 5 is a loop antenna, 5a
Is a fixed conductor, 5b is a movable conductor, 12 is a changeover switch, 1
4 is a main body. The fixed conductor 5a and the movable conductor 5b can be inductively coupled (electromagnetically coupled) to each other in a non-contact manner, and the fixed conductor 5a and the movable conductor 5b are inductively coupled to each other, so that the fixed conductor 5a and the movable conductor 5b have high frequency. And the loop antenna 5 is formed.

In FIG. 3, the movable conductor 5b can be inserted into the gap formed in the fixed conductor 5a of the loop antenna 5 by moving the changeover switch 12 (hereinafter, this state is referred to as "ON state"). . Thereby, in the loop antenna 5, both ends of the gap of the fixed conductor 5a are connected by the movable conductors 5b, the loop coil forms a complete loop, and radio waves can be transmitted and received.

On the other hand, when the changeover switch 12 is moved to separate the movable conductor 5b from the gap formed in the fixed conductor 5a, the loop antenna 5 is disconnected at both ends of the gap of the fixed conductor 5a (hereinafter, this state will be described). Is called "OFF state"). Therefore, the loop coil does not form a complete loop because both ends of the gap of the fixed conductor 5a are not connected,
You cannot send or receive radio waves. As a result, even if the reader / writer 1 sends a question to the non-contact IC card 3,
Since the radio waves cannot be transmitted / received, as a result, it becomes possible to refuse the reply to the reader / writer 1. In addition, this makes it possible to protect the personal information stored in the non-contact IC card 3.

As described above, the non-contact IC of this embodiment
When the card 3 refuses to read the personal information held inside the non-contact IC card 3 from the outside according to the purpose of use, the changeover switch 12 is turned off to make the loop antenna 5 It is possible to disconnect the power supply to the IC chip 4 by disconnecting the
It is possible to provide a non-contact IC card capable of refusing to read the personal information held by the non-contact IC card 3.

(Second Embodiment) FIG. 4 is a schematic plan view showing a loop antenna and a changeover switch of a non-contact IC card according to a second embodiment. The configuration of the non-contact IC card in this embodiment is the same as that shown in FIG.

In FIG. 4, 3 is a non-contact IC card, 4 is
3 is an IC chip, and 5 is a loop antenna, which is the same as that in FIG.

In the present embodiment, the loop coil of the loop antenna 5 is fixed to the main body of the non-contact IC card 3, and has a fixed conductor 5a formed in a shape having a gap in a part of the loop, and a fixed conductor. It is composed of a movable conductor 5b which is detachably arranged in the gap 5a. Also, the loop antenna 5
Are formed in a loop having a circular shape, an elliptical shape, a distorted circular shape, or a distorted elliptical shape. Further, the IC chip 4 is arranged at the position of the feeding point of the loop antenna 5. The gap of the loop antenna 5 is formed at a position facing the feeding point.

Reference numeral 13 is a switching chip for switching the loop antenna 5 between a state in which transmission and reception is possible and a state in which transmission and reception is not possible. The movable conductor 5b is fixed to the switching chip 13, and by inserting and removing the switching chip 13, the movable conductor 5b can be inserted into and removed from the gap between the fixed conductors 5a.

FIG. 7 is a cross-sectional view of an essential part of a switching chip according to an embodiment of the present invention.

In FIG. 7, 5 is a loop antenna, 5a
Is a fixed conductor, 5b is a movable conductor, 13 is a switching chip, 14
Is a main body, and 15a and 15b are conductor terminals. The fixed conductor 5a and the movable conductor 5b respectively have metal conductor terminals 15a and 15b at their contact portions, and the conductor terminal 1 of the fixed conductor 5a.
Physical contact between 5a and the contact terminal 15b of the movable conductor 5b connects the fixed conductor 5a and the movable conductor 5b to form the loop antenna 5.

FIG. 8 is a cross-sectional view of an essential part of a switching chip according to another embodiment of the present invention.

In FIG. 8, 5 is a loop antenna, 5a
Is a fixed conductor, 5b is a movable conductor, 13 is a switching chip, 14
Is the body. The fixed conductor 5a and the movable conductor 5b can be inductively coupled (electromagnetically coupled) to each other without contact, and by the fixed conductor 5a and the movable conductor 5b being inductively coupled,
The fixed conductor 5a and the movable conductor 5b are connected in high frequency,
The loop antenna 5 is formed.

In FIG. 4, by inserting the switching chip 13 into the gap formed in the fixed conductor 5a, the movable conductor 5 is inserted into the gap formed in the fixed conductor 5a of the loop antenna 5.
b can be inserted (hereinafter, this state is referred to as “ON state”). Thereby, in the loop antenna 5, both ends of the gap of the fixed conductor 5a are connected by the movable conductors 5b, the loop coil forms a complete loop, and radio waves can be transmitted and received.

On the other hand, when the switching chip 13 is detached and the movable conductor 5b is detached from the gap formed in the fixed conductor 5a, both ends of the gap of the fixed conductor 5a of the loop antenna 5 are cut off (hereinafter, this state). Is called "OFF state"). Therefore, the loop coil does not form a complete loop because both ends of the gap of the fixed conductor 5a are not connected,
You cannot send or receive radio waves. As a result, even if the reader / writer 1 sends a question to the non-contact IC card 3,
Since the radio waves cannot be transmitted / received, as a result, it becomes possible to refuse the reply to the reader / writer 1. In addition, this makes it possible to protect the personal information stored in the non-contact IC card 3.

As described above, the non-contact IC of this embodiment
When the card 3 refuses to read the personal information held inside the non-contact IC card 3 from the outside according to the purpose of use, the changeover switch 12 is turned off to make the loop antenna 5 It is possible to disconnect the power supply to the IC chip 4 by disconnecting the
It is possible to provide a non-contact IC card capable of refusing to read the personal information held by the non-contact IC card 3.

(Third Embodiment) FIG. 9A is a schematic plan view of a non-contact IC card according to the third embodiment. still,
The functional block configuration of the non-contact IC card in this embodiment is the same as that shown in FIG.

In FIG. 9A, 3 is a non-contact IC card, 4 is an IC chip, and 5 is a loop antenna. Since these are the same as those in FIG.

In the present embodiment, the loop coil of the loop antenna 5 is fixed to the main body 16 of the non-contact IC card 3 and has a fixed conductor 5a formed in a shape having a gap in a part of the loop, and fixed. The movable conductor 5b is arranged in the gap between the conductors 5a so as to be freely inserted and removed. Further, the loop antenna 5 is formed in a loop having a circular shape, an elliptical shape, a distorted circular shape, or a distorted elliptical shape. Further, the IC chip 4 is arranged at the position of the feeding point of the loop antenna 5. The gap of the loop antenna 5 is formed at a position facing the feeding point.

Reference numeral 12 is a changeover switch for switching the loop antenna 5 between a state in which transmission and reception is possible and a state in which transmission and reception is not possible. In the present embodiment, the changeover switch 12 is
It is used as a push switch.

FIG. 9B is a schematic sectional view of the changeover switch portion of the non-contact IC card according to the third embodiment.

In FIG. 9B, 5a is a fixed conductor and 5a is a fixed conductor.
Reference numeral b is a movable conductor, and reference numeral 16 is a main body of the non-contact IC card 3, which are similar to those shown in FIG.

Reference numeral 17 denotes a pressing portion of the changeover switch 12 which is arranged so that it can be inserted into and removed from the gap formed in the fixed conductor 5a, and 18 urges the pressing portion 17 in a direction to separate it from the gap formed in the fixed conductor 5a. It is a spring. The movable conductor 5b is the pressing portion 1.
7, a spring 18 is provided between the lower portion of the movable conductor 5b and the main body 16, and the pressing portion 17 and the movable conductor 5b are urged in a direction of separating from the main body 16.

In FIG. 9, when the user pushes the pressing portion 17 of the changeover switch 12 toward the main body 16, the movable conductor 5b and the fixed conductor 5a fixed to the changeover switch 12 are fixed.
And are in contact with each other, the loop coil of the loop antenna 5 forms a complete loop, and the loop antenna 5 is in a state capable of transmitting and receiving.

On the other hand, when the pressing portion 17 of the changeover switch 12 is stopped from being pushed toward the main body 16, the elasticity of the spring 18 separates the movable conductor 5b from the gap between the fixed conductors 5a. As a result, the loop coil of the loop antenna 5 is disconnected, and the loop antenna 5 does not receive the electric wave that carries the power and the signal transmitted from the reader / writer 1. Therefore, the non-contact IC without the user's recognition
It is possible to prevent information stored in the card 3 from being stolen by another person.

In the first to third embodiments, the loop antenna 5 has been described as being circular, but it may be rectangular.

[0072]

As described above, according to the non-contact IC card according to the first aspect of the present invention, the information storage unit for storing information, the communication control unit for controlling communication with the outside of the card, and the outside of the card. A non-contact IC card including a loop antenna for transmitting and receiving radio waves and a disconnecting means for forcibly disconnecting communication with the outside of the card. By disconnecting the communication with the outside of the card, in response to the question from the reader / writer,
A non-contact IC card that enables a user of the non-contact IC card to refuse to return information held by the non-contact IC card and can protect disclosure of non-contact IC card information not requested by the user. The advantageous effect that it can be provided is obtained.

According to the invention of claim 2, claim 1
In the non-contact IC card described in (1), the disconnecting means is a changeover switch that switches between a state in which the loop antenna can transmit and receive and a state in which the loop antenna cannot transmit and receive. By making it impossible, the inquiry request from the reader / writer can be easily rejected.
It is possible to provide a non-contact IC card capable of preventing leakage of data held by the C card.

According to the invention of claim 3, claim 2
In the non-contact IC card described in [1], the loop coil of each loop antenna is fixed to the card body, and is formed in a shape having a gap in a part of the loop. The movable switch is provided so that it can be inserted into and removed from the gap, and the changeover switch is used by inserting the movable conductor into the gap formed in the fixed conductor and connecting the fixed conductor and the movable conductor. Depending on the purpose
A contactless IC card capable of reliably connecting or disconnecting a loop antenna can be provided.

According to the invention of claim 4, claim 3
In the non-contact IC card described in, the changeover switch is
The movable conductor is interlocked with the pressing portion, which includes a pressing portion that is insertably / removably arranged in a gap formed in the fixed conductor, and a spring that biases the pressing portion in a direction to separate from the gap formed in the fixed conductor. With such a configuration, it is possible to provide a non-contact IC card that can easily switch between the used state and the unused state of the non-contact IC card.

According to the invention of claim 5, claim 3
Or the movable conductor has a conductor terminal in a portion connected to the fixed conductor, and the movable conductor has a fixed conductor. Since the conductor terminal of the movable conductor is in contact with the conductor terminal of the fixed conductor in the state of being inserted in the gap of the non-contact type IC card, it is possible to easily switch between the used state and the unused state of the non-contact IC card. A contact IC card can be provided.

According to the invention of claim 6, claim 1
In the non-contact IC card described in (1), the movable conductor is configured to be connected by inductive coupling between the fixed conductor and the movable conductor without contacting the fixed conductor in a state of being inserted into the gap of the fixed conductor. As a result, it is possible to provide a non-contact IC card capable of easily switching the used state or the unused state of the non-contact IC card.

According to the invention of claim 7, claim 1
In the non-contact IC card described in (1), the cutting means is composed of a switching chip detachable from the loop antenna,
When the switching chip is attached to the loop antenna, the loop antenna can be used, and when the switching chip is detached from the loop antenna, the loop antenna cannot be used. By removing the switching chip, it becomes possible to reject the data held in response to the question of the reader / writer, and it is possible to provide a non-contact IC card capable of preventing leakage of the data held by the non-contact IC card. .

According to the invention described in claim 8, claim 1
In the non-contact IC card described in (1), the loop coil of each loop antenna is fixed to the card main body and is fixed to the switching chip, and the fixed conductor is fixed to the switching chip. In the state where the switching chip is mounted in the gap formed in the fixed conductor of each loop antenna,
With the configuration in which the fixed conductor and the movable conductor are connected, it is possible to provide a non-contact IC card capable of reliably connecting or disconnecting the loop antenna according to the purpose of use.

According to the invention of claim 9, claim 8
In the non-contact IC card according to the item 1, the fixed conductor has a conductor terminal at a portion connected to the movable conductor, the movable conductor has a conductor terminal at a portion connected to the fixed conductor, and the movable conductor has a gap between the fixed conductors. Since the conductor terminal of the movable conductor is in contact with the conductor terminal of the fixed conductor when the contactless IC card is inserted into the contactless IC card, the contactless IC card can easily switch between the used state and the unused state of the contactless IC card. Cards can be provided.

According to the tenth aspect of the invention, in the non-contact IC card according to the eighth aspect, the movable conductor is inserted into the gap between the fixed conductors without contacting the fixed conductors, and Since the fixed conductor and the movable conductor are connected by inductive coupling, the non-contact I
It is possible to provide a non-contact IC card capable of easily switching between the used state and the unused state of the C card.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a non-contact IC card system.

FIG. 2 is a functional block diagram showing the configuration of the non-contact IC card according to the first embodiment.

FIG. 3 is a schematic plan view showing a loop antenna and a changeover switch of the non-contact IC card according to the first embodiment.

FIG. 4 is a schematic plan view showing a loop antenna and a changeover switch of the non-contact IC card according to the second embodiment.

FIG. 5 is a perspective view of a main part of a changeover switch according to an embodiment of the present invention.

FIG. 6 is a perspective view of a main part of a changeover switch according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view of essential parts of a switching chip according to an embodiment of the present invention.

FIG. 8 is a sectional view of an essential part of a switching chip according to another embodiment of the present invention.

9A is a schematic plan view of a non-contact IC card according to the third embodiment, and FIG. 9B is a schematic cross-sectional view of a changeover switch portion of the non-contact IC card according to the third embodiment.

FIG. 10 is a block diagram showing a structure of a conventional non-contact IC card.

[Explanation of symbols]

1 Reader / Writer 2 antenna 3 Non-contact IC card 4 IC chip 5 loop antenna 5a Fixed conductor 5b movable conductor 6 Modulation circuit 7 Rectifier circuit 8 regulator 9 Demodulation circuit 10 Communication control unit 11 Information storage section 12 changeover switch 13 switching chips 14 body 15a, 15b Conductor terminals 16 body 17 Pressing part 18 spring 19 Non-contact IC card 20 Proximity type non-contact part 21 Proximity antenna 22 Proximity type communication control unit 23 Proximity modulator / demodulator 24 Proximity power supply section 25 Remote type non-contact part 26 Remote antenna 27 Remote communication controller 28 Remote modem unit 29 Remote power supply 30 MPU 31 Information storage unit 32 Information Processing Department 33 Power storage unit

Claims (10)

[Claims] 1. A non-contact IC card comprising an information storage unit for storing information, a communication control unit for controlling communication with the outside of the card, and a loop antenna for transmitting and receiving radio waves to and from the outside of the card. A non-contact IC card, which is provided with a disconnecting means for disconnecting communication with the outside of the card. 2. The non-contact IC card according to claim 1, wherein the disconnecting means is a changeover switch that switches between a state in which the loop antenna can transmit and receive and a state in which the loop antenna cannot transmit and receive. 3. The loop coil of each of the loop antennas is fixed to a card body, and has a fixed conductor formed in a shape having a gap in a part of the loop; A movable conductor that is removably disposed in the gap, wherein the changeover switch is configured to insert the movable conductor into the gap formed in the fixed conductor and connect the fixed conductor and the movable conductor. The non-contact IC card according to claim 2, wherein 4. The changeover switch includes a pressing portion that is removably disposed in the gap formed in the fixed conductor, and a direction in which the pressing portion is separated from the gap formed in the fixed conductor. The non-contact IC card according to claim 3, further comprising a biasing spring, wherein the movable conductor is interlocked with the pressing portion. 5. The fixed conductor has a conductor terminal at a portion connected to the movable conductor, the movable conductor has a conductor terminal at a portion connected to the fixed conductor, and the movable conductor is the fixed conductor. 5. The non-contact IC card according to claim 3, wherein the conductor terminal of the movable conductor contacts the conductor terminal of the fixed conductor in a state of being inserted into the gap. 6. A structure in which the movable conductor is connected by inductive coupling between the fixed conductor and the movable conductor without contacting the fixed conductor in a state of being inserted into the gap of the fixed conductor. The non-contact IC card according to claim 3 or 4, wherein 7. The cutting means is composed of a switching chip detachable from the loop antenna, the loop antenna is in a usable state when the switching chip is attached to the loop antenna, and the switching chip is The non-contact IC card according to claim 1, wherein the loop antenna is in an unusable state when it is detached from the loop antenna. 8. A loop coil of each of the loop antennas is fixed to a card body, and has a fixed conductor formed in a shape having a gap in a part of the loop, and a fixed conductor fixed to the switching chip. A movable conductor removably disposed in the gap, wherein the switching conductor is attached to the gap formed in the fixed conductor of each loop antenna, the fixed conductor and the movable conductor are The non-contact IC card according to claim 7, wherein the non-contact IC card is configured to be connected. 9. The fixed conductor has a conductor terminal in a portion connected to the movable conductor, the movable conductor has a conductor terminal in a portion connected to the fixed conductor, and the movable conductor is the fixed conductor. 9. The non-contact IC card according to claim 8, wherein the conductor terminal of the movable conductor is in contact with the conductor terminal of the fixed conductor in a state of being inserted in the gap. 10. The structure in which the movable conductor is connected by inductive coupling between the fixed conductor and the movable conductor without coming into contact with the fixed conductor in a state of being inserted into the gap of the fixed conductor. 9. The non-contact IC card according to claim 8, wherein